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Find the order of magnitude of the number of table-tennis ball

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Find the order of magnitude of the number of table-tennis balls that would fit into a typical-size room (without being crushed).

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Practice more questions on All topics

Question 1

Medium

When a weight of

5 kg

is suspended from a copper wire of length

30 m

and diameter

0.5 mm

, the length of the wire increases by

2.4 cm

. If the diameter is doubled, the extension produced is

$1.2 cm$
$0.6 cm$
$0.3 cm$
$0.15 cm$

Topic:

Mechanical Properties of Solids

Book:

Master Resource Book in JEE Main Physics (Arihant)

View 3 solutions

Question 2

Medium

The central fringe of the interference pattern produced by the light of wavelength

6000 \overset{˚}{A}

is found to shift to the position of

4^{th}

bright fringe after a glass sheet of refractive index

1.5

is introduced. Find the thickness of the glass sheet.

Topic:

Waves

Book:

Physics Galaxy Optics and Modern Physics Vol 4 (Ashish Arora)

View 5 solutions

Question 3

Medium

In four complete revolutions of the cap, the distance travelled on the pitch scale is 2 mm. If there are 50 divisions on the circular scale, then calculate the least count of the screw gauge.

$0.5 mm$
$0.4 mm$
$0.3 mm$
$0.25 mm$

Topic:

Units and Measurements

View solution

Question 4

Medium

A ring of mass

M

and radius

R

is rotating with angular speed

ω

about a fixed vertical axis passing through its centre

O

with two point masses each of mass

M /8

at rest at

O

. These masses can move radially outwards along two massless rods fixed on the ring as shown in the figure. At some instant, the angular speed of the system is

(8/9) ω

and one of the masses is at a distance of

\frac{3}{5} R

from

O

. At this instant, the distance of the other mass from

O

$\frac{2}{3} R$
$\frac{1}{3} R$
$\frac{3}{5} R$
$\frac{4}{5} R$

Topic:

System of Particles and Rotational Motion

Book:

Mechanics Volume 2 (DC Pandey)

View 2 solutions

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Question 1

'3. The human eye has a diameter of 0.6 cm. What is the angular resolution of the human eye? What is the angular resolution for a telescope with a diameter of 10 cm? What is the angular resolution for the Keck telescope, which has a diameter of 10 meters?'

Topic:

Physics

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Question 2

36.3 Momentum of 1.00 -eV electron:

m_{e} c^{2} = 511 keV

E^{2} p c = (m_{e} c^{2})^{2} + (p c)^{2} = (m_{e} c^{2} + K)^{2} = (m_{e} c^{2} + K)^{2} - (m_{e} c^{2})^{2} = (511 keV + 1.00 \cdot 1 0^{- 3} keV)^{2} - (511 keV)^{2} = 1.01 keV .

Momentum of

100 - keV X

-ray:

(m_{e} c^{2})^{2} + (p c)^{2} = (m_{e} c^{2} + K)^{2}

p c = K = 100 keV

Momentum of electron is

1%

of that of

X

-ray, or negligible.

Topic:

Physics

View solution

Question 3

FIND THE RANGE 0.14 m Incline 0.25m Table 1 Range Floor Incline 3 0.14mT 0.25m Table ? Range I Floor

Topic:

Physics

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Question 4

Laplace's Equation with the Matching Game: A thin insulating sphere of radius a is charged such that the potential on the surface (relative to letting the potential V(r) approach 0 as r approaches infinity) is Va = Vo cos^2Î¸ + Vo cos^2Ï†. i. Determine the potential inside and outside the sphere. ii. Determine the charge density on the surface of the sphere.

Topic:

Physics

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Question Text	Find the order of magnitude of the number of table-tennis balls that would fit into a typical-size room (without being crushed).
Topic	All topics
Subject	Physics
Class	Class 11

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